I have a Server 2008 R2 x64 server that almost always fails the backups. We are using Acronis Advanced Server Virtual Edition v10. I don't think that matters, because I can't even take a snapshot manually. I have figured out that vCenter reports that vmware tools is not running; even though the service is usually running. The backups fail with failed to take snapshot, VMX Protocol error. If I restart the vmware tools service, then start the backup or snapshot, it usually works. If not then a second restart of vmware tools usually does it.
I have uninstalled vmware tools, rebooted, then reinstalled vmware tools. The same problem still exists. It is running on ESXi 4.1. I don't know if this matters but the vm in question is also the vCenter server.
Does anyone have any suggestions on a fix or how to troubleshoot this further?
Thanks